Porsche wants to reinvent the turbo, and the hybrid system

Porsche wants to reinvent the turbo, and the hybrid system


For Porsche, building more efficient turbos is one of the keys to the survival of the internal combustion engine. The patent reveals a completely new, hybrid turbo.

What if Porsche replaced the turbo? After his work on synthetic gasoline, and in parallel with the development of various types of electricity, the German manufacturer is working hard to make the combustion engine more efficient. The stakes are high for Porsche: to be able to maintain its range of fun cars and engine heat, and you can delay (or even cancel) transition from 911 to all electric. In the new patent revealed by media CarBuzzPorsche is preparing a completely new approach for it future turbos. Details.

Turbo, an incomplete solution

The operation of a conventional turbo is simple. Exhaust gases cause a turbinewhich he works a compressor. The latter is responsible, as its name suggests, to compress the air entering the cylinders, to power up prepared for certain transfers. And, in theory, improve engine efficiency. This is also why the “downsizing” rate, the replacement of large air engines with small heat engines, has spread like wildfire with the arrival of stricter environmental standards in recent years.

When the driver is driving calmly, the turbo is not activated at all, and consumption is reduced. When power is needed, the turbo is driven by the exhaust and full power is available. But here, the set is not complete. The turbo works at its maximum efficiency only internally specific engine speed conditions and open the butterflies. To solve the problem, many manufacturers are now choosing small turbosturbos of different geometry, or twin-turbo systems.

Hybrid in the service of turbos

But Porsche thinks it can go even further. His patent shows A true hybrid turbo. Well, the turbine is now separated from the compressor. Between the two, the electrical energy recovery system. The concept is reminiscent of the systems used in F1 or for endurance and LMP1 hybrids. But Porsche goes further, by combining here two small exhaust turbines with a large compressor, to benefit from the efficiency of the twin-turbo systems and the high power of the large turbocharger. In practice, small turbines no longer drive the compressor, but charge a small battery. So they can be used in the most efficient phases, and cut off when consumption increases. In return, the compressor is driven by a electric motorwhich eliminates turbo lag and allows its use to be more efficient.

In short, a truly hybrid turbo that, if its implementation lives up to its promises, can deliver impressive performance while achieving great utility. The only concern, as usual with hybrid systems, is stiffness and weight. The next generation 911 will it be equipped? Answer in a few years.

Source: CarBuzz

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